Superheater boiler



Oct. 23, 1928.

R. L. SPENCER SUPERHEATER BOILER Filed Feb. 1926 2 Sheets-Sheet l Reamer A. Jam/c512. 2

TTORNEY.

' Oct. 23, 1928. 1,688,669

R. L. SPENCER SUPERHEATER BOILER Filed Feb. 8, 1926 2 Sheets-Sheet 2 ii mumuuuunu H J'ORNEY Patented Get. 23, 1928. v

UNITED STATES ROBERT L. SPENCER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO HEINE BOILER, COMPANY OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

SUPERHEATER BOILER.

Application filed February 8, 1926 Serial No. 86,856:

This invention relates to water tube boilers of the upright, bent tube type, and has for its main object to provide a novel superheater boiler in which the superheater is constructed so as to obtain a true counter flow ot' the gases and steam that circulate over the exterior and through the interior, respectively, of the superheater elements, thereby producing an exceptionally etticient superheater boiler.

Another object is to provide a superheater boiler ot the kind referred to that is compact and easy to repair.

Figure 1 of the drawings is a vertical longitudinal sectional view of a superheater boiler constructed in accordance with my in 'vention.

Figure 2 is a vertical longitudinal section: al View, illustrating a slight modification 0t my invention.

Figure 8 is a vertical transverse sectional view, taken on the line 3 3 of Figure 1, looking in the direction indlcated by the arrows; and

Figure 4 is a top plan view of the boiler shown in Figure 1.

I have herein illustrated my invention embodied in a conventional V-type Heine boiler which comprises three elevated steam-and- 30 water drums A, B and G, a lower water drum D, a radiant heat bank of water tubes E that lead upwardly from the water drum D to the front steam-and-water drum A, a convected heat bank of tubes F that lead upwardly from said water drum to the middle steam and-water drum B, a downcomer bank of tubes G that lead downwardly from the middle steam-and-water drum B to the lowor water drum D and a rear bank or economizer bank of tubes H that lead downwardly from the rear steam-and-water drum C to the water drum D, the elevated steam-and-water drums being connected together by conventional water circulators 1 and steam circulators 2, and baffles 3 and 4 being arranged at the rear sides of the convected heat bank and the downcomer bank, respectively, so as to cause the gases to circulate upwardly among the tubes of the radiant heat bank and the convected heat bank, then downwardly among the tubes of the downcomer bank G and thereafter upwardly among the tubes of the rear bank H.

The boiler is equipped with a superheater composed of upright superheater elements I arranged in vertical lanes between the tubes at the front side of the boiler, an intake head or J at the upper end of the boiler connected to the upper ends of said superheater elements and a dischar e header K arranged adjacent the lower end of the boiler and connected to the lower ends of the superheater elements I. Preferably, the intake hcaderJ is arranged transversely of the boiler between the tront and middle steam-and-water drums A and B, respectively, and the discharge header K is arranged transversely oi the boiler in the space between the convected heat bank F and the downcomer bank G. The intake header J of the superheater is connected by a pipe 5 with one of the ele vated steam-and-water drums of the boiler, preferably, the rear drum C, and a superheated steam supply pipe 6 leads from the discharge header K, as shown in Figure 3. The superheater elements I are preferably arranged in a plurality of groups, each oi which comprises several superheater elements positioned one behind the other in the same vertical lane of the tube bank, and in order that the terminals of said superheater elements will not be spaced too closely together at the points where said superheater elements are connected to the headers J and K, the end portions of some of the superheater elements of each group are bent laterally at w, as shown in Figure 3.

I am aware of the tact that it is not new to arrange superheater elements in vertical lanes in a tube bank of a water tube boiler, but I believe that it is novel to provide an upright, bent tube boiler with superheater elements and headers disposed so as to obtain a true counterflow of the gases which circulate over the exterior of the superheater elements and the steam which flows through the interior of said superheater elements, this desirable result being attained by using relatively long superheater elements which extend in the same general direction as the boiler tubes, namely, upwardly, and whose terminals are connected to headers arranged adjacent the upper end and adjacent the lower end of the boiler. This desirable characteristic, coupled with the fact that the superheater ele ments lie principally between the boiler tubes. instead of in open spaces between the steamand-water drums or between the tube banks, produces an exceptionally efficient boiler that is compact and easy to repair.

In Figure 2 of the drawings I have illustrated a superheater boiler that has all of the desirable features and characteristics of the boiler shown in Figure 1, and the added advantage. that the superheater elements I can be drained into the discharge header of the superheater, this being obtained by arranging the discharge header K at a point below the lower terminals of the superheater element-s1.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A water tube boiler, comprising a plurality of elevated steam-and-water drums, a lower water drum, banks of upright water tubes connected at their lower ends with said water drum and at their upper ends with said steam-and-water drums, the front tube bank being arranged so that the gases from the combustion chamber will flow upwardly over the same, upright superheater elements arranged in vertical lanes in the front tube bank, an intake header attached to the upper ends of said superheater elements and arranged in the space between the first and second steam-and-water drums, and adischarge header attached to the lower ends of said superheater elements and arranged at the rear of the front tube bank.

2. A water tubeboiler, comprising a plurality of elevated steam-and-water drums, steam circulators and water circulators connected to said drums, a lower water drum, banks of upright water tubes connected at their lower ends with said water drum and at their upper ends with said steam-and-water drums, the front tube bank being arranged so that the gases from the combustion chamber will flow upwardly over the same, a battle at the rear side of said front tube bank, upright superheater elements arranged in vertical lanes in the front tube bank, an intake header connected to the upper ends of said superheater elements and arranged transversely of the space bounded by two of said steam-andwater drums and the steam-and-water circulators attached to the same, and a discharge header connected to the lower ends of said superheater elements and arranged at the rear of the baffle behind the front tube bank.

3. A water tube boiler, comprising a plurality of elevated steam-and-water drums, a lower water drum, banks of upright water tubes connected at their lower ends with said water drum andat their upper ends with said steam-and-water drums, the front tube bank being arranged so that the gases from the combustion chamber will flow upwardly over the same, a baffle at the rear side of said front tube bank, groups of upright superheater elements arranged in vertical lanes in the front tube bank, each of said groups comprising a plurality of superheater elements located one behind the other, an intake header attached to the upper ends of the superheater elements and arranged in the space between the first and second steam-and-water drums, and a discharge header attached to the lower ends of said superheater elements and arranged at the rear of said baflle, some of the superheater elements of each of said groups having their terminal portions bent laterally at the points where they are attached to said headers.

ROBERT L. SPENCER 

